Vortex tube



1.1 : Perspective

1.2 : Front

1.3 : Rear

1.4 : Left

1.5 : Right

1.6 : Top

1.7 : Bottom

In the reproductions, the broken lines are for the purpose of illustrating portions of the vortex tube that form no part of the claimed design. 

CLAIM The ornamental design for vortex tube, as shown and described. 